ATE205460T1 - METHOD FOR PREVENTING OXALATE DEPOSIT - Google Patents

METHOD FOR PREVENTING OXALATE DEPOSIT

Info

Publication number
ATE205460T1
ATE205460T1 AT94870087T AT94870087T ATE205460T1 AT E205460 T1 ATE205460 T1 AT E205460T1 AT 94870087 T AT94870087 T AT 94870087T AT 94870087 T AT94870087 T AT 94870087T AT E205460 T1 ATE205460 T1 AT E205460T1
Authority
AT
Austria
Prior art keywords
ppm
preventing oxalate
inhibitors
deposit
oxalate deposit
Prior art date
Application number
AT94870087T
Other languages
German (de)
Inventor
Krzysztof Kuczynski
Original Assignee
Solutia Europ Nv Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from EP93870111A external-priority patent/EP0629585A1/en
Application filed by Solutia Europ Nv Sa filed Critical Solutia Europ Nv Sa
Application granted granted Critical
Publication of ATE205460T1 publication Critical patent/ATE205460T1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
    • C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02—Phosphorus compounds
    • C07F9/28—Phosphorus compounds with one or more P—C bonds
    • C07F9/38—Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids ; [RP(=X1)(X2H)2(X1, X2 are each independently O, S or Se)]
    • C07F9/3804—Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids ; [RP(=X1)(X2H)2(X1, X2 are each independently O, S or Se)] not used, see subgroups
    • C07F9/3808—Acyclic saturated acids which can have further substituents on alkyl
    • C07F9/3817—Acids containing the structure (RX)2P(=X)-alk-N...P (X = O, S, Se)

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hydrology & Water Resources (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Health & Medical Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Paper (AREA)
  • Treating Waste Gases (AREA)
  • Lubricants (AREA)
  • Polyamides (AREA)

Abstract

A process of inhibiting oxalate scale formation in aqueous systems is disclosed. A preferred class of scale inhibitors is represented by polyamino hexamethylene phosphonates. These phosphonate inhibitors can be used in levels of from 0.05 ppm to 300 ppm (of the aqueous solution) at pH in the near neutral to preferably alkaline medium.
AT94870087T 1993-06-14 1994-05-24 METHOD FOR PREVENTING OXALATE DEPOSIT ATE205460T1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP93870111A EP0629585A1 (en) 1993-06-14 1993-06-14 Process of inhibition oxalate scale formation
EP94870087A EP0628518B1 (en) 1993-06-14 1994-05-24 Process of inhibition oxalate scale formation
US08/257,855 US5490942A (en) 1993-06-14 1994-06-10 Process of inhibiting oxalate scale formation

Publications (1)

Publication Number Publication Date
ATE205460T1 true ATE205460T1 (en) 2001-09-15

Family

ID=27235604

Family Applications (1)

Application Number Title Priority Date Filing Date
AT94870087T ATE205460T1 (en) 1993-06-14 1994-05-24 METHOD FOR PREVENTING OXALATE DEPOSIT

Country Status (6)

Country Link
US (1) US5490942A (en)
EP (1) EP0628518B1 (en)
AT (1) ATE205460T1 (en)
DE (1) DE69428230T2 (en)
DK (1) DK0628518T3 (en)
ES (1) ES2163427T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9603029D0 (en) * 1996-08-20 1996-08-20 Svenska Traeforskningsinst Method for lowering the level of oxalic acid
MY138251A (en) * 2001-06-06 2009-05-29 Thermphos Trading Gmbh Method for inhibiting calcium salt scale
ATE492682T1 (en) * 2001-06-06 2011-01-15 Dequest Ag METHOD AND AQUEOUS COMPOSITION FOR PRODUCING IMPROVED PULP
MY129053A (en) * 2001-06-06 2007-03-30 Thermphos Trading Gmbh Composition for inhibiting calcium salt scale
ITMI20021706A1 (en) * 2002-07-31 2004-02-01 Bozzetto Giovanni Spa POLYAMINOMEYLENPHOSPHONE DERIVATIVES.
US7807021B2 (en) * 2006-06-21 2010-10-05 Blackstone Michael M Compositions and processes to increase pulp yield, reduce extractives, and reduce scaling in a chemical pulping process
US20100197545A1 (en) * 2009-01-30 2010-08-05 Ecolab USA High alkaline detergent composition with enhanced scale control

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434969A (en) * 1967-08-11 1969-03-25 Calgon Corp Scale inhibiting
US3619427A (en) * 1970-06-22 1971-11-09 Textilana Corp Methods of scale inhibition using polyalkylene polyamino polykis methylene phosphonic acids and their salts
US4872995A (en) * 1983-10-26 1989-10-10 Betz Laboratories, Inc. Method for calcium oxalate scale control
US4575425A (en) * 1984-12-24 1986-03-11 Calgon Corporation Process for controlling calcium oxalate scale over a wide pH range
DE3526640A1 (en) * 1985-07-25 1987-01-29 Benckiser Knapsack Gmbh CORROSION AND STONE PROTECTION AGENTS FOR DOMESTIC WATER SYSTEMS
US4804476A (en) * 1987-10-23 1989-02-14 Calgon Corporation Process for controlling calcium oxalate scale over a wide pH range
EP0479462B1 (en) * 1990-10-04 1995-11-08 Britoil Plc Method for inhibiting scale formation
GB2248830A (en) * 1990-10-04 1992-04-22 Britoil Plc Method for inhibiting scale formation
US5338477A (en) * 1991-05-31 1994-08-16 Calgon Corporation Polyether polyamino methylene phosphonates for high pH scale control
AU2701392A (en) * 1991-10-15 1993-04-22 Calgon Corporation Method for controlling calcium sulfate scaling in metal mining circuits

Also Published As

Publication number Publication date
DE69428230D1 (en) 2001-10-18
DE69428230T2 (en) 2002-06-27
DK0628518T3 (en) 2001-12-17
EP0628518A1 (en) 1994-12-14
ES2163427T3 (en) 2002-02-01
US5490942A (en) 1996-02-13
EP0628518B1 (en) 2001-09-12

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee